Properties of the Number 2188

Two Thousand One Hundred Eighty-Eight

Basics

Value: 2187 → 2188 → 2189

Parity: even

Prime: No

Previous Prime: 2179

Next Prime: 2203

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 547

Divisors: 1, 2, 4, 547, 1094, 2188

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100010001100

Octal: 4214

Duodecimal: 1324

Hexadecimal: 88c

Square: 4787344

Square Root: 46.776062254106

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Motzkin numbers: number of ways of drawing any number of nonintersecting chords joining n (labeled) points on a circle. A1006

a(n) = 3ⁿ + 1. A34472

Triangle T(n,k), 0 <= k <= n, read by rows, defined by: T(0,0)=1, T(n,k)=0 if n < k, T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1). A64189

Motzkin triangle, T, read by rows; T(0,0) = T(1,0) = T(1,1) = 1; for n >= 2, T(n,0) = 1, T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k = 1,2,...,n-1 and T(n,n) = T(n-1,n-2) + T(n-1,n-1). A26300

Third spoke of a hexagonal spiral. A56107

Numbers that are the sum of 2 positive 7th powers. A3369

a(n) = sigma₇(n), the sum of the 7th powers of the divisors of n. A13955

Numbers that are the sum of 4 positive 6th powers. A3360

Array read by downwards antidiagonals: sigma_k(n) for n >= 1, k >= 0. A109974

a(n) = ∑_i=1..n binomial(i+1,2)⁷. A85442